Air and vacuum valve for radiators.



No. 673,3I9. Patented Apr. 30, |90l.

W. H. DUEB.

AIB AND VACUUM VALVE FUR BADIATDBS.

(Application led June 30, 1900.)

(No Model.)

@ML IIIIII UNITED STATES PATENT OFFICE.

WALTER I-I.` DUER, or` FOND :DU LAC, WISCONSIN.

AIR AND VACUUM- VALVE FOR RADIATORS.

SPECIFICATION forming part of Letters Patent No. 673,319, dated April 30, 1901.

,Application ledAJune 30, 1900. Serial No. 22,146. (No model.)

To atl whom it may concern:

Beit known that LWALTER H. DUER,a citiz en of the United States, residing at Fond du Lac, in the county of Fond du Lac and State of Wisconsin, have invented a new and useful Air and Vacuum Valve for Radiators, of which the following is a specification.

My invention relates to air-valves for radiators, and has for its object to produce a device of this kind which will be compact, simple, and eflicient and which can be applied to radiators provided with hot water or steam and can be adjusted to suit conditions and will be automatic in its operations at all times.

With this objectin view my invention consists in theimproved construction and novel arrangement of parts of an air-valve for radiators,as will be hereinafter more fully set forth.

In the accompanying drawings, in which the same reference-numerals indicate corresponding parts in each of the views in which they occur, Figure 1 is a sectional view, partly in elevation, of an air and vacuum valve embodying my invention. Fig. 2 is an enlarged sectional detail View of the upper portion of the same, and Fig. 3 is a perspective detail view of the means for adjusting the same.

Referring more particularly to the drawings, 1 indicates the casing of my improved air-valve, which may be secured to the base 2 in the usual manner. The base is provided with the usual inlet and outlet passages 3 and 4E and the screw-threaded projection 5 for securing it in position. The upper end or neck of the casing is interiorly screw-threaded in its intermediate portion, as shown at 6,

and is recessed internally, as shown at 7, and

screw-threaded externally, as shown at 8, at its upper end. A cap 9 lits upon the exterior screw-threaded portion and engages a shoulder 10 with its lower edge or mouth and is the seat 13 to prevent the entrance of air into the casing and from there into the radiator and pipes of the system when the pressure therein goes below the atmospheric pressure.

If desired, the valve maybe provided with a stem 16, which ts within the smaller portion of the perforation of the rod. Projections 17 arise from the upper end of the rod and extend over the enlarged portion of the opening or bore to 'engage with and prevent the escape of the valve from said enlargement. The projections may be'formed separate and secured in position after the valve has been inserted, or they may be formed integral with the rod and be bent over the upper end of the bore after the insertion of the valve. The upper end of the rod is preferably formed into a head 18, which fits within the recessed portion 7 of the neck and is provided with the usual kerf 19 or notch for the screw-driver to be used in adjusting the rod.

Projecting up into the lower end or enlargement of the bore of the rod is a valve 20, the upper end of which is adapted to be forced upon the seat 14 and prevent the escape of water or steam when the radiator is being used. The valve 2O may be formed upon or secured to the upper end of a hollow ioat or cap 21, which preferably rests upon the upper end of an expansible rod 22, which is seated in the base of the casing.

In using my improved air-valve it is secured tothe radiatorin the usual manner and the parts properly adjusted. When steam or hot water is admitted to the radiator, a portion of it enters the casing through the inlet and forces the air out through the sleeve, the valve in the upper end opening for the escape of the air. If hot water should enter the casing, as soon as it reaches the desired point therein the float or cap 21 will be raised sufciently to force the valve at its upper end into engagement with its seat, and thereby prevent the escape of the air or hot water. If steam be admitted, it will soon heat the eXpansible rod within the float suiiciently to cause the longitudinal expansion to force the valve upon its seat in the rod, thereby preventing the escape of air and steam.

lf desired, the inlet may be provided with a short pipe or extension 23, which is adjacent to the lower end of the expansible rod IOO and between it and the lower end of the fioat, which extends nearly to the bottom of the casing, which will cause the entering steam to `strike against the rod and to be confined around it, so as to heat and expand the rod as quickly as possible, and thereby prevent the escape ot' the steam from the air-valve While the rod is being heated.

As the water becomes cool or as the steam becomes condensed within4 the casing it escapes through the outlet into the radiator, the outlet` being provided with a projecting pipe 24, which will prevent the water'frorn running down the end of the projection 5 and rusting the screw-threads between it and the radiator. After the steam or hot Water has been shut o the radiatorand airvalvegradu ally cool, when the valve in the lower end of the rod at the top of the casing will be withdrawn by the contraction of the rod and theA lowering of the float, and the valve in the upperend of the rod willbe seated and prevent the entrance of air into the casing. In this manner a vacuum will be formed in the radiator, and steam or vapor from the boiler Will be drawn4 up into it Without any pressure from'the boiler.

If at anytime it is desirable to change the adjustment of the parts, the cap at the upper end of the air-valve can be removed and the rod in the neck of the casing can be adjusted in relation to the valve and casing by rotating it in the proper direction by means of an ordinary screw-driver, after which the capis reinserted andthe device is ready for use.

Having thus fully described my invention,

what I claim as new, and desire to secure by ALetters Patent, is-- 1. In an air andvacuum valve, the combination, with a casing provided with an inlet and an outlet and the upper end provided with a neck, of a perforated sleeve adjustably secured in the neck, each end of said perforation being enlarged to form a valve-seat, and

the upper end being provided with two in wardly-extending projections and two oppositely-lo'cated notches between said projections, a valve on the seat under said projections, a perforated cap on the neck over the valve, an expansible rod within the casing, and a float on the rod, the upper end of which is provided with a valve to fit upon the seat in the inner end of the sleeve, substantially as described.v

2. In an air and vacuum valve for radiators, `the combination, with a casing, the base of which is provided with an inlet and an outlet, of a sleeve in the upper end of the casing provided with a valve-seat, an expansible rod secured to the base in alinement therewith, a hollow iioat upon the expansible rod, the upper end of which is provided with a valve in position to be forced vagainst said seat and the lower end extends nearly to the lower end of the casing, and a pipe leading from the inlet toward and terminating adjacent to the expansible rod and within the lower end of thefloat, substantially as described.

W. I-I. DUER. 

